Use regular expressions to dynamically create/Add CSS style scripts compatible with IE Firefox

STR indicates the xmlrequest returned through Ajax
/* Dynamically load CSS style */
Function loadstyle (STR)
{
VaR regexp_src =/<style. * SRC \ s * = \ s * ["'] [^"'] * ["']. *> [^ <>] * <\/style \ s *>/GI;
VaR matcharray_src = Str. Match (regexp_src );
Alert (matcharray_src [0]);
If (matcharray_src ){
For (VAR I = 0; I <matcharray_src.length; I ++)
{Alert ("Sss ");
VaR str_temp = matcharray_src [I]. tostring ();
VaR regexp_src_temp =/<style. * SRC \ s * = \ s * ["'] ([^"'] *) ["']. *> [^ <>] * <\/style \ s *>/GI;
Str_temp.match (regexp_src_temp);/* here, the matching is used repeatedly. The $1 subexpression points to the current value, otherwise it will always be the last $1 value */
VaR head = Document. getelementsbytagname ('head') [0];
/* Ie */
If (document. All ){
Alert ("ie ");
If (document. getelementsbytagname ('style') [0])
{
VaR sty = Document. getelementsbytagname ('style') [0]. innerhtml;
Alert (STY );
VaR sty = Document. getelementsbytagname ('style') [0]. innerhtml;
// I don't know how to obtain the current style label of IE. If you use getelementsbytagname, you can only use this policy to create a new one and add the previous style.
VaR stylesheet = Document. createstylesheet ();
Stylesheet.css text = sty + Regexp. $1;
}
Else
{
VaR stylesheet = Document. createstylesheet ();
Stylesheet.css text = "body {Background: Red ;}\ <br \>"
Alert ("finished ");
}
}
/* Firefox */
Else {
VaR style;
If (document. getelementsbytagname ('style') [0])
{
VaR sty = Document. getelementsbytagname ('style') [0]. innerhtml;
Alert (STY );
Document. getelementsbytagname ('style') [0]. innerhtml = sty + Regexp. $1;
}
Else
Style = Document. createelement ('style ');
Style. type = 'text/CSS ';
Style. innerhtml = Regexp. $1;
Head. appendchild (style );
Alert (Regexp. $1 );
}
}
}
}
/* Dynamically load a script with the src attribute */
Function loadscript_src (STR ){
VaR regexp_src =/<script. * SRC \ s * = \ s * ["'] [^"'] * ["']. *> [^ <>] * <\/script \ s *>/GI;
VaR matcharray_src = Str. Match (regexp_src );
If (matcharray_src)
{
For (VAR I = 0; I <matcharray_src.length; I ++)
{
VaR str_temp = matcharray_src [I]. tostring ();
VaR regexp_src_temp =/<script. * SRC \ s * = \ s * ["'] ([^"'] *) ["']. *> [^ <>] * <\/script \ s *>/GI;
Str_temp.match (regexp_src_temp );
VaR head = Document. getelementsbytagname ('head') [0];
VaR script = Document. createelement ('script ');
Script. type = 'text/JavaScript ';
Script. src = Regexp. $1;
Script. Defer = "true ";
Head. appendchild (SCRIPT );
Alert (Regexp. $1 );
}
}
}
/* Dynamically load the script in innerhtml */
Function loadscript (STR ){
VaR regexp_function =/<SCRIPT [^>] *> ([\ s] *?) <\/Script [\ s] *>/GI;
VaR matcharray_function = Str. Match (regexp_function );
If (matcharray_function ){
For (VAR I = 0; I <matcharray_function.length; I ++ ){
VaR str_temp = matcharray_function [I]. tostring (); // In fact, it is very convenient to search forward and backward using a regular expression, but JavaScript does not support it. Therefore, this policy can only be used.
VaR regexp_function_temp =/<SCRIPT [^>] *> ([\ s] *?) <\/Script [\ s] *>/GI;
VaR matcharray_temp = str_temp.match (regexp_function_temp );
Eval (Regexp. $1 );
}
}
}